Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42dcedad4c1958a88a61fa11597f707a9a0a0bf68e76e3fa64140d0de918f33b' 
  AND token = 'mojOyCzwl+iSggk9hxDQaNb5EHU0WoI6MmQ/y3kiU+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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