Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a7d3edf07e174d42f7cdbe4c764c13ee9a6f054a475d02138b56eb7dc828758' 
  AND token = 'monyfxu8QElrytlzf9XYTOV+HZK6t+hqyAvnQ06X2NY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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