SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcdc5dd516cc6717660f140b2689e9dcbf1518d0e3b5a383261ad75668ebb93d' 
  AND token = 'VgKQm1CT0eXqX8woaNKI/HnBmQ7jEZpGtQa2+EWF9/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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