Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96aab59c5eabafb3aa43012af557e66e0b030a884ac6b7da0fe9289783c30eab' 
  AND token = 'TyX+Bi3ClGefVzMu86Q8LVNhyDzGzcsRTC0R7ytzCog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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