Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66483d21a281ec3077d5a66c935242c156abfb523e19768460b886deaeafd9f3' 
  AND token = 'IDfzjGPF/7bfqORScC3V9YDEsRpi2Ewk4Ry2RehGR/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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