Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35064ee00cdbfeb9ad2c51dca8fdc343d45d7122a947115e72b70da547e67503' 
  AND token = 'Boc3GEPk3ulBo7KyAMNzC7a609Bta/mZX8PH0FLH+f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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