Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '612c2bdfb20a2961bb74a2471e38cf981ea1092886b5751966a8c0b129c5502d' 
  AND token = 'zr1CkTno/tOUYeJ2zIPe09IU+pWRgbrCXpsyLTPrTIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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