Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c41f61f5f4f9e24b85b3529c15982e08875dd9f91417e537c03c1cb7c073f35' 
  AND token = 'b814KK+1s0eR+5icAM22FS0LCupWVlu/FB0KWhG94a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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