Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '482a0016422ffc76c12cc923a38b27307419204a77836fdf7254b8e91dfecaa4' 
  AND token = '9gTBFUhq2UWs/83pMmN/yemueymRxob347IAI7owtaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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