Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b0115d1f9f0f7c1560b1901dfc6dc042cbdd7dda7e679f7fc9b39a8df25625e' 
  AND token = 'kwis+8zCHDA75AIaMiXlN6qrbURO7jF6WYGYZUxwi18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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