SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1879258412b3be2b9c69316a1518c4cea3deb0d4d06002812f438d276ea77b05' 
  AND token = '5J8sThxlz969QBHpBXDxk8+VqyARCOT8vW/SM3KtOq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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