Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b6f862d78afe5957299cbbc314b228e17a60657be2186981adbecca96ce6ef2' 
  AND token = 'COcunYGLnAXcP+09teaoHM5R5f+G/XZCOImTr5gRx6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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