SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '025743e1f3fe97a5caf6316922d355268f991c9a39c9056dc66f2771ad5866c0' 
  AND token = 'qhTYjJ5JrwAKKuHqEBmzNBnRCQJy9GLymBlre5gWyp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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