Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aba4b70482da18eec85e8c0d91a7777ee9af572427dff4475f87a7d1f8ba64b3' 
  AND token = 'iECTiJtAL2skhpqkaaLW4lC5dgBgDO3qSNUwC8JpivM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}