Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'c469965464cb27adcce01f63e61c2f5f06b74dd116db757b702e5f190d91cbc2' 
  AND token = 'y3CEWHVVTPWEke4mLESKoCGK3hjMIYr0CaaZd0xw9ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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