Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b20930bd561e2d3e967271734b80180f021d8c4154221236951e679b7b9803af' 
  AND token = 'E8aAboPLmG2aRqneYVpvDOMeg0+8h0G6pK/ifAQke84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}