Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1014e4b027eaf26b0d9fc2b4834a5f45ff03ff46f69b374d403f3c27dc1bb349' 
  AND token = '/w0qP16LZWyJK/UevkWmn63NQGx9TfXj3dwxbluHzoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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