Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49d4eacecf35c4f385438fece3bc68aa1869dd0875883c7c34fbfcd8db2ed037' 
  AND token = 'BT7fx8mdofl/dxHT30BwlIGht734sfBVLaXEW32P1ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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