Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0b34da35230c440b3e22eb94634fb1742aba424c51b2ae45cd1ef57014ee11a' 
  AND token = '9cM+TerXksEEcfnB8/+9NgZjMqB0vwwtNGERNsqA90E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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