Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30dd6b499f487ab1e99a734ff7545b43f29997228c0bfb27e234bab02072a60d' 
  AND token = '5Dr0sb57Q6GUTaKU3JaXTuIc1M31FI6OWn5vTPR9exA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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