Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb03a85c9f6803bd630187d757fb53c36fa38373f024efe01cf07357d67bbb6c' 
  AND token = 'aFHKG6B3eYzlxMsa06KcYvfXmLJWW1Rn5CPCghQgHas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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