Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '463c209a076d33ee6410afcffb0bcd390685c6713af02848cbdcb698d292a80c' 
  AND token = 'j9GlKhwN1ogJz7oDzjnEGtopDBtt3/8SJme4CjsaWB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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