Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b579705983c2754c722d5359aa688ac8d501269c0c8c9ed6a75598ffe71a50a5' 
  AND token = 'rtACbeUyiriinJ/oEjGSVSC0hMEG0horJSq+I0Q85hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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