Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041a73c8d8aaba50fdc075335db7212ff5390df8d55c4f6130b43c5c0fcc6cde' 
  AND token = '3cZlCwcmljt2crgLxVVOX0MV2oxvnACiDUIq7l081j4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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