Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1613e64573926b05204dfc09a01277e66cda9e03d6d379906d2ff262a86118a' 
  AND token = '9cMPnv77uWSb09jcSj+DGSwNxyN19YMRiXnxH0AAh4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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