Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43f0f29d8aa45c0acf064c422363a37f4c4f9769e27384835272cb4369217fa6' 
  AND token = 'FV1C4AJywl7GLzS71EIewUwU+IK3dXs098edvMfVLI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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