Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59f3947b0b0ef0d4c04a0a4f77ef847e67ef2f64ecbab8d6e1306435ac144f50' 
  AND token = '1KeyW8NyZ6793Be68SLPoRv9CgnI/u9sOJywcIzsUG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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