Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76652c290ed5ed2030f7b2844ef4d61478c942d4a2665f78a01c48b0d58fbbe' 
  AND token = 'sznIgMFm3FxwL6x4JAld/88M9Jb38+3r3mY+ZxERkTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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