SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b5313f5d39427323ef6b612d31da7cc8c6aefc91bb77767bd02245da405b13f' 
  AND token = 'owKc9PEhHG25YYsXEsW31BtSEMHI6P6kU0RqjhjsGzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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