Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dec5ff9b4fcdcaa45a0da02550dcd2fe7034d3a52e22675b66a41c6c7bb46fbb' 
  AND token = 'Rj+N5mIdbm4bH+E79HU8Hl9Iqdn/ge2lEVM3rC24Khg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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