Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92c3349aa5aecc26e84ee64355b10bf9c64801e656351b7918992b4c3d43f963' 
  AND token = 'WMK7WbYFMBIxT4etb9HZ6dKGbbcZhZD5yXI5KIzzuXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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