Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbc8df7fc3dfd84816a21b096eda71e7907eb5b08784bfb8d33cb9285981397f' 
  AND token = 'Kkk/8pfEvWFsu7i94lh7t+9R91DmUsqZJljlB2UcbMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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