Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d68a33df8536030daea5b72d227382911ff6a13a2a9ddc054203742423a7209' 
  AND token = 'j8RJuN+kT9HuC765a8/6enCVaN6OeNq3R2OT8nK++DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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