SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c22921398c7b787f669a1979ebc9658c911a12e6929efe7bcbcc5d2756a713' 
  AND token = 'b8bq/XonaQSJHnHsyGl8Djr/4NI7qOp+O1nin0AMHys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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