Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13ab6f459e020d7a41df3c0bc7fdc1e000b5fa28d86beef8f1dd1de7ab2d9c76' 
  AND token = 'HST77aeqNtK50tCqO32jG9fgUa6Kp31gMH7K6RGGbEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}