Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6e0f8c15eec6464e9b98a9107bbed9b910967f5922ba084f003f09538ffe5bd8' 
  AND token = 'LnYerO32RXgIcQmsOCEF711E/AidxajfnoxOqwNq4Hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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