Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c29de249eb153dfff78b7d3aa4c7ed74530fd38bf3c67ad11eafb07083ee93eb' 
  AND token = 'JR8UGbzZpUpmHt62khqOLMes8EMsSxHAdmrtTcPpZXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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