Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33c4ce3ee87b2f9a877da7b33634d57da978c17a1ab6a3d9ed19b46312f711a8' 
  AND token = 'rST+A6RrJZPwmO1t5pavjJYd2xVch8dwT9+HZQk9LnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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