Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4517ff261ded2194059c4f8ca1d0911a6fa12c08530059b79a29df9e7466ccde' 
  AND token = 'HsgGLL23k2CAfrmhkG5mIfOU3bVRv5sRUlwyN221pU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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