Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5959a92995d115091d82f44ae189c21e946f021c4439aad19e2dffbc60e6d36' 
  AND token = 'sGTr8olPW26vfMWMzpvSgAa9NCp/UPejyJo3kOp0Rkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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