SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '952371aeeb714ed1985fb6969e55067f6fb0606155b2747103fac4125b5e31b7' 
  AND token = 'JOGJ8ur+ny41C1iJTIH0MvGY0wcueu8QTa61xPGZpyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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