SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'abb0d02ce42ed40b9c1563617529e33d5ef7836597689f07e4c2ac62188abbfa' 
  AND token = 'TV2/fH77/PHw1PxBvzINOYDTQkal41ZnVdqeF6nPi7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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