Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f190ad10024c2a221b8680c2a0affea5febbd446db00d53ee1c10be76507a77' 
  AND token = 'unf0vs+qBSGkMZmrBgjMkn2krQnYtluMfWyDkDDEXBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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