Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fd670e346b66e900f80300de6a73ea51e157c1abe777d5110c0aacb123537e0' 
  AND token = 'B9D/ww16PX0vOwW7oz/8JHpg6PQ3D8Go4pLiIgE210Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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