Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '703a4fee9603c638208da470a308eb286511855a9f205d02bea37a6d6b743af7' 
  AND token = 'NOs5maZWOtcf0hrkW+c2i4dcCCogcP6PagXELJGp3ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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