Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82afe0461854abaded664ee0d6942fb29664b07d3dd40043f98604a5ba1b9c9b' 
  AND token = 'qGU86nCUznf/zS5uxpvF9Hjf0m2vVuI1TiWcUlct428=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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