Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db86affad140578fcbd4f968cf8675f0cce847fcfa58da7bc3c165708fd323f0' 
  AND token = 'cvwoiwi9BsXEXXVXKx19uQe+4i43dOQaGQ5DAL7UcOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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