Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '836050998fbade287d8123e398a324455335f2c8f7d0720d01c7f726a37fdcde' 
  AND token = '/ui7s3N9YrgY5pfGhgl61KYlN2RroybqfeoNudBtdiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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