Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c3849ec01587d7d10465153b50fc8c0f56e392c7d4c70154e14cc85642e2cdc' 
  AND token = '7q/+rj405cVWBvw4vc7eHZJpwfs47kEYQ9H4ZniP30g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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