Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3def0f3237d2fd585a4526c72dd2989fdf588a2c50cd61e8115ca0e75adf64cc' 
  AND token = 'I26Q+DFsQ4cQuF8QeK9N8xCUfu8ZLBvbYqP6amSWqak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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