Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9cda93f98d386246267436fccf4168ff0182f4a9b1db80a6a6268d12e1186d88' 
  AND token = '213wkqQCcr+ztAmD+/so+xm9i3s+B69G6Akb3wF42JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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