Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '210f8c8a4888aa98a673294eacfae9d3d01a1b8031e897a46637251ec793481a' 
  AND token = 'gyh3V+LKup04pKVXGaiLHYMCZqs59AssCf6P1qnlR0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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