Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0588d17cdff86f61ae7de4d1f3e941da6fa24f7cbc52a316b15f8eac569453a2' 
  AND token = 'AKAn/WY/V+tDabsukLsekDN810JIatBQ2Q1HlrKoMV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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