Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f8894e2642bb19808eff68aac4dc0f8f92b8dbc9c8b3942a68e5e2b146116a9' 
  AND token = 'lP2T3samXHkpJ8/M8FsceWQI7ULGlpWAyzxFEjsDbBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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