Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb1fcf821819655131657831eb168adc9412448cfb1c431eceaf422560b011d' 
  AND token = 'gkCwAvCPUZ+yTcFQwJWYuSdWOuaBYL6sP8XeB23NWRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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