Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0bd135d74e17e409ff8478c490166f480832a092f1e428c596de9eeede498fa4' 
  AND token = '120GRVzoVsI4BgfEjlMFC+w53HFbQLrS5fvOXWQ26N0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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