SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '695b9330fdbb83ed361f3e3bb788dd3272351a84b45496dadca820b44a4f3687' 
  AND token = 'LbsoId7PvVbUCDDG/zG0wT9sJrtY6lL3QbUox5KbqkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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