Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c04c9b587b74671f58f2426f19db54bef748719cb5880c544aad873289b05779' 
  AND token = 's/YdW+Ks0qQdqqoZiZ10cT8b3IJXm/8BSfUEJwUteEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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