Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40e5eaff29800e938d433f172513b9da177932eae3575183c4fa9802b1fedbc8' 
  AND token = 'wzCPeCZlhyUGzb92HTZtCgIWTHthOcAHWvGCs/LO7uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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