Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b69ec8e47df6cb372899345f334ba271c48231166cd2321c97345caa2cdf887' 
  AND token = 'xb0ce+u9TN1824TPoVOU4t/mrG7VKn+pwffUF/6TAYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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