Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63fef643c39ebaa47071d9315cd4e9f5c8f51b835eebe9f045c7daedb02fa9c9' 
  AND token = 'Sn1SFFIA6oGHnWb/sZYh7FMMaaKupIFY+pcnFm2KLd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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