Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a048d0c2e836f02a68497528c0c3401463c390ac66d8c14749f38b6b4a9c0192' 
  AND token = 'TdtsV6/g+7dF0sctfkNiN46Uq/XHVLYx6Jio+x8Q57c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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