SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c1c151adfd1859d83c0220df5fdaa118b94ace9045ace5d1c57f2690715784' 
  AND token = '0cE4ecErWC5z97inqP5rIGTMzI+0mQqLkRgt5q6VCaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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