Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c90e7a3ad86540a676cbc91f39e208d6a39156e00a95e546b26b58d8727c714' 
  AND token = 'W4SSoyJFWnf/4lq8ymHrko2uDxDq7IR7ThRqJID6NHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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