Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8458aa4245276237f94b5b9045d796268c78bc31e61014a8e887ca605e16fee' 
  AND token = 'NxLqMSrusuZwu0j4dAfWcSORBkQ/yBZbN11DBDQkI24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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