Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb0af4bcc9458fb047e6b117a435be6a3a7567296fdb6bffe20457fc9f7c832' 
  AND token = 'tj5nIzyd7Xk75a4EN/PLGZ8Rn3tU2uERElqqMlOIce8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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