Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f3301abc0339249df060b5edc2a3b612cc8d963300cade4909dc12e7a635dd6' 
  AND token = 'zNep38aTaNfK9hEpWCoPwDoM4dKKXps+KH6lzmylaUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}