Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6fb0a50fc9d7b19d7f3514993ed20257a8f281a8df8290b59a7537fe8440ae' 
  AND token = 'TRY93P5bC9EzqwI48beVFLWmk/Er+kmImleAfURGDWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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