Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af6d9af54c4f5cdced60de7c5c9b2a6a6bfdef81654cdd1efe4f51fe90c6309c' 
  AND token = 'jWt0x1qLLNneaQI5eeSWteXT9aQy925K/eFRO6tbcfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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