Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8a05bf485d7205ced0d6f3b0b813d179ba5702ce7393261b3b7ecc7bc9ed99f' 
  AND token = 'GshFkuwghiVm8BdgZ3WRQkR6Equuq75acSceqOj//3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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