Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'db4ac859db8effd6ac3fcc75912ae5d2c00424c9d98650a5d5af1c93975c85b6' 
  AND token = 'HBtvGb5uUn1sEp78a2IPmIByZ51YX2j0e0XS8XCZTwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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