Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5637ed97fab96bac1b8b05091bca9a1872f6a306bd153017bce2ecce49e3bbd4' 
  AND token = 'yeH9+h84a7IDz6UUYXKZNfDyVEC9g89YZngbXNaNwRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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