Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03e49f702ac1e74cda3f03279e6258724626cb28a1f3b07a5306efd7082a024c' 
  AND token = 'LxUWzBhow+yjqCBDaqwSHIsANDaz2daced/i7xf/ScI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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