Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cc373829bb0a99684f0e8ef25600c2d41ca1613c6f8506dcb7fdac7a01cb810' 
  AND token = '8e7piV8pN6F7pZpI1djKe1DdOgeBSTpkXB9+hQfkn3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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