Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a0f616baf4869506fa11c0acf2677cddcdd019dedbb4d0c256789d7d05fe9b1' 
  AND token = 'mUURxZnDuLJQ0mbtAwjUUAEeNvuTHz28SdMIBXM+4p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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