SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11506b81bf90955d25f381890954b53da25beed7724283adf9936365a6332951' 
  AND token = 'd63vtZqKMwSga47pXsJVImpiYswx7ydZM2KQs6YxRh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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