Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8505689d129def31006bac4449b464d330ab84932c8a22bcbfe828c3a909d43f' 
  AND token = 'WX/W+pTkN1Omyr93FwIL3v5BoGTqQUGkIn0muwiTmT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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