Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59e2d33cd546cfa18ac253a083e7ac72c894d17d7dddd38cc4dd619cec4895d6' 
  AND token = '71OX/j/Wr+GbexO3Hqy3U1egHawNANprAS9EYiNUVNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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