Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0f88c6830d182b602d08ac0672714882682b5ab18ba32ac3816598c0874b692' 
  AND token = '5kYxPV10JKr9yMQJBjBKibHyAKr4cFltpn5EuRSWjLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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