Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa8f5d044dac7c52ae3ad35c0cc4a571656117e46ab11ec00713e975f7629e9f' 
  AND token = 'On0FNp49/NeaYqA3aAo41kOaJRzf51lHtUHW6C63Bx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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