Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09ad0fc4e25fa489bc47d82697b17b7a5b6f71a05d7c249206d2264586316a74' 
  AND token = 'ULeHi1dTBzrGW0WExVmyRt1idTg7oJyaV/yht96LqeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}