Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c7224b99b01062976277d008003453d743741478df7137d72e46c5bf36feeca' 
  AND token = '7+yAdalAeMtTGm8md8gUjzKpyG7OgT/g4Q4kZjw0TXA=' 
  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"
    }
  }
}