Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '350481098ca5d192f39f94e59eed3d19a81d15590888242b8d33c27210e7872e' 
  AND token = 'SxlKtGJM7CiYk5MHpO9DpP2K5ydnm9BujAPI0Cez+rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}