SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1378348d84d0eace0ff9d438d9a5f2ef00aef7466d1d9dc12f09ff47917fb11a' 
  AND token = 'fEWhWL69J9rFZ3IT2VYYN/XLOla3IkghGUHxptsT44c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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