Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5056ef56cb27a12441eb148bfc4f7f5d217771847912462d22c171144654ae03' 
  AND token = '+9alA0DrJwCzwQZo7bBg/h3wKb4iL5Nd90LiNarnG18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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