Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a605de0e756e59305207af9b3823cb25b2be0e7f35eb03c4cc7bdd30180a62' 
  AND token = 'mmtqUqYxw2Z5yg4+/lsZfYVoulAkBkQJuM/orFQBn8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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