Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741a4a60c90964a4b8f9d41e0afcae0198036a017ba7d36c98d6d4c21ff75e52' 
  AND token = 'RT/AJw1TUAni8FumFS5Ozou/SbAyPzvPl6WNgnzpg/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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