Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b1d182605b71458ee3d64b2e5fdb100392ca93aaa497d37bb4f1851cb2384c6' 
  AND token = 'G/2nw/SXxFa4unyDSLyKKlMUAe4m4w6MBV84/w/vjT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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