Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7132bf3d9a4374f5f6f30a0a6243b2abe705940d1bb5f0d488f62bb36777c271' 
  AND token = 'P8MhdoPIcGNZJ2YYzfSn8xN0pSd2hLRD86c75F+qkGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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