Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12c5aed508ecf49302bcb8a0fbb12a6d563b5cc34916d9594c104c2f7eb28006' 
  AND token = 'LsN7pRxJLKWrMnpXBeIEFzuAXJquWw1fKpMKSkfjuoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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