Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd08dcde11824cd331b48ed1d22f4d6ea28bdcd6e2d5d0ee2df197b153d77ff8' 
  AND token = 'ePqDCy5YgaeU3c6IFrruipF3R9Wc27zhfm11EV+JqW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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