Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '299eb728502c0b1edda007ca7b0502971061b03f2f96feacc99c94c6f11b2127' 
  AND token = 'mGUt+25dCKGykNTzgRwpcwUWcBfg8kfcEoJIoK6ioOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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