Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd93ddf07b548e65c0b317c0043c90f46e3468483732c52a3807fc560ebab3cdc' 
  AND token = 'tWnR1ozkY6ZEKf4J4i9mNyqLre3igFcoW7nOqWBKh4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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