SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20ad094e7f52f2d3a0faa2964eb39288b19bbe12c2b2fec2f3f1b04184e337a6' 
  AND token = 'oNigGvqMANjMlI6z2kqGF/BRhTPTEevDuDPXLak4kKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables