Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4157da0f8b95a12eb7116b9a392a23a532e1f03f9dafbfc4db715b533c16e66' 
  AND token = 'edVZSY6w0S4TpBQ7h0SOdwwzZYMvQDl2inrFnpyAMB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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