Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee94a5d3d934d101cbb0cbebd70ff45f317eeafc56e93c591de2d4f20f84545a' 
  AND token = 'EY9u9wzgIwnOVOrHLVKjOON0EiewbjsE3YhIAlEcs5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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