Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83157a6d996a89bd0fdcdee11f9080c307cae45869daab9734559654d49e6381' 
  AND token = 'ItiL8nAaSeJKyb+5qsT+X3J5NOObc8iyAuzieGAh0dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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