Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd75af700e4889e6b9fdd82825923332b87d9f7715cbd3ffc6d32d2d09cdad05b' 
  AND token = 'k5odAZ1ByA9s2uEdOnH9W7c8ZHvzcr1tWZ0JeA3Om9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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