Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e29189e03647a640fc5904c8d86111084c39c05246c7a60cf5224baf2ecb43' 
  AND token = '0qRUXINU41gFNNcWcliRcmB91JB9QNAopMuzWgnwofE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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