Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2840a9bf08242288a6b2d6d7054e1eae1d844fb7e599fe0689c436eba6d634d1' 
  AND token = 'bwHOFT54plC8GMd0XGEyJoM0bYnqvXn6Kps5ZTmv4Jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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