In this study, we genotyped polymorphism in GPX1 Pro198→Leu (C→T) rs 1050450 in four groups, i.e., patients with coronary artery disease, people who lived a long time (over 90 years), people who died early (before 55 years) from cardiovascular disease, and the Russian population as a control group. We have found a significant higher T-allele frequency in men with coronary artery disease, i.e., 34.84% (χ^²= 5.228, p = 0.022; OR =1.46), and in men who died early from cardiovascular diseases, 38.16% (χ^²= 6.461, p = 0.011; OR = 1.69) compared to men in the control group, 26.8%. Moreover, a significantly higher genotype TT frequency has been shown in patients with coronary artery disease and myocardial infarction before age 50, which is 19.44% compared to the control group, which was 7.28% (χ^²= 9.55, p = 0.002). The TT frequency in individuals who lived a long time (4.39%) was the lowest and differed significantly from the group with coronary artery disease, which was 12.79% (χ^²= 8.07, p = 0.0045), and from the subgroup with coronary artery disease with myocardial infarction before age 50, which was 19.44% (χ^²= 14.49, p = 0.0001). Thus, our results indicate that the TT allele (Leu) of GPX1 Pro198→Leu (C > T) polymorphism is unfavorable for successful aging; it leads to predisposition to coronary artery disease, early myocardial infarction (before age 50), and early death (before age 55).