Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2431df9012be24ae7d6afb1847c65e4f68b209bcb0f0609eb273a8ccaf7d83f1' 
  AND token = 'f6K7PLRHJhX7oaBrj2oQ/muqVp1uknK67pAidksD08E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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