Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd5fc7e12899e0cddd231cba3f21dc6d9534a3931544251c79e7bff3caabb5dc' 
  AND token = 'Hf1SefRPbQtbRi3tmI6hapy6Wes/jA26De+0+FlfjZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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