Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f293ee5201ba01fcad9df8495f0746b50551206f63c701bbd0506c72639b5f3' 
  AND token = 'zZuaY9LUA8mvb4z3efKcxcufaOT9gt5rQKU8Q8X27zA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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