Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0bb51ad239f129cbbd8aa99265e4019b6a8e74ecd3fb08a1f69dd991501525c3' 
  AND token = 'jx8TsYiDlvoW94adDyvfd9UfQP6kLAQX8Uv7YbTPAx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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