Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd30113f0c6edfd7708c0d67a8ac6bc7e944aa7b1b615d06c046c2d474985b344' 
  AND token = 'bgf/9c7rI2ZWFnVilJXQP9JzROpkRQ9LxcSzFZZqBFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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