Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38ae7392bbf12fd358cd23f328a5eb422d530d500b2b44d7c258a0f6edc2a69e' 
  AND token = 'FiPZ3SS6/XuOniJFiOFzCdzPpg+1gViVPZrn5fZD4U0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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