Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eeaf919dbef3c576712a6997d20c86e71551cbed051850de83d79811615fbe4' 
  AND token = 'QdXW8n159YnKKo7LPvOLRSRAWFeA+z1xH3/2ef655kU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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