SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fda54cbb19138ec27a04da67a32f85bed57ee5341c012570a91c2b8fe019764f' 
  AND token = 'J8BWQfMA3HyDo7WKOuzhMbAgvJdpm+pGwSyzo2xd9gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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