Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd161a6ce252898c6d395d998d09896a11f30f61ef2a25435b4982061de33cb0f' 
  AND token = 'J0hVUBqhBx5kotMxhhMwaLHuBdHUKxCILRAfhUUFPZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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