Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f126e4027888f86e127939f24c95c103c9f4181c4dad8ba16e0ebe98c0ecf1bc' 
  AND token = 'By1NlQtmZ8XRqZjXHvtuM4JymA0r56pLGd5dA6hhw4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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