Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba9f238d9a9dd46e5d533195d88989b24d9bd80c1030d811f533496ddf3e7cc' 
  AND token = 'j8myGUGfsITOM30sPmEb4FhjviNnbTYaY+VRavwjoaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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