Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '055bd675f81a6d46ac8f323ade71be0af036cc1e482c22399953761b029ae9ad' 
  AND token = '3S2OHKrkso7mWU2j4KXyVIvOSR+/UfLAa3OTzwu9DHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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