SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1764769f90f4111b96e06954bd195a7b528d4c82dcfa030738fbe8771540665a' 
  AND token = 'v7WDo+ZBNoFnOSk2bPVPrYWSD2UxWl9wyDeCNpSORuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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