Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eef829bebb16e1a40e48e868759252c861755cd2fdeb1b3a54aeee93b14854d8' 
  AND token = 'z+EtWW0nnsLfZpuN+6PP19/kvb5Mg26Xuef/r7iQUe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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