Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76222ad63db3f6d5c2429836654f95921e57cea7b1ac590d7cabce55665f6ec' 
  AND token = 'AbPVsTSVN4htZvcwSkGzqISlF4LIsw71R2JN/qarFng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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