Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8610c77bdcaadc45f77e4ddbdf93409400d675987ddcadbd68c144e57bd06d2' 
  AND token = 'KcWkGOai6YD7pEXXIVvM2R/oX9RUA/6iLPenZ9+93QA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}