Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17a6cf372d6ca50424a22bde06a00bcb9bedcf9915b2a7cd60abf820da075dfc' 
  AND token = '6crq965BDGLQi4fMeHQChnZa01T5OcWestcUl+owS6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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