Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '395bb8cb10684e463497761dbb434afae445e77efc0810971018ce8fbad2f31b' 
  AND token = '1Mng3tJmt3HhsRO2ahV4WlFxyFC4zW9NL7676qcgDYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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