Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e71a78400ea399230b4c27fb7a6237d80e1f453e8f294ab4ae7264524437b5b8' 
  AND token = 'VGT8FHImqq+j6sahOyT9o5h916vT2dVs4mR8nJa8eyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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