Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b407968de7b5476af4b50ce2a66980871a44642ffa453bc093ed6d0596eae2af' 
  AND token = 'VxYcLpIcqPp5MJU6V6JIr7qBQbpiREKue3CTS1O5Ab8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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