Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0223ea9dee99dd6646701b422b4129bb75edde58d447d9f8f8010ff466988f23' 
  AND token = 'hEuXvjfjsiO8mHhqVbLXWqObYg5J07IeC4KGdi1eAd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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