Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9eadc72e96d4d269b8b26f6befc40cf8bedf863e664170ff6d783862040e4395' 
  AND token = '1Nz0+nRtqGHZfNiihByeP/jUbHl4RbRD2oNj6v02dxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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