Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35dfbbefe755ebd357c59f7d4e0d75763f3bd7c1b520f480dba21e27508f676f' 
  AND token = 'qOW6IssFqltAMlu4s4HXjqL3K2v4ReCmH5CDMcv487c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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