Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da16cd2e0ad366178da8c945eea93f6b0d0af91a09b947646a398171ab9fd367' 
  AND token = '7qaPtWG/Jqibx5LgEgFU4ImnD8ZhT1zCl1Q9OgWQGW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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