Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '333e6b1420bd698ff16bc276678819b3fce3c660f8c89dd1814cd1509ed47c61' 
  AND token = 'UgiWRxiOCL0r0fxvQXRqSbaI62Lys2kBeGCJy+xJKkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

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