Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42910d0d0b9fb736587b7c8feae8699574ddf366cdf1cf32c3bc90064cabd60f' 
  AND token = 'qR07TKA0DOIEtCwoa3SF5q+nChyage9RN1ExTOJjDqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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