Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3770dcd6e93d0507e1e342d5ad00d1f2916e2128bd1b22b4b0f161e4b643139a' 
  AND token = '417c3xxa88sTqb0iPDwKbUalc7L8QSATuOjLFZ9tzpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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