Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9636687e8c59a712c20a500c731ae5ab47b8bd19a74bb25e45e7f4ece8715b71' 
  AND token = 'Okxtminu9aCAojp7APLAI+ZkGf80gGzq/lUdjNBLwRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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