Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08e31f0b261a7cc1b6200b87229f173f167ef44e227505898b56f9fa47adb579' 
  AND token = 'jkOL3F/pw4m/MTnbJd+2Qsay1MVbAnvDIs0T6BdlGSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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