Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08fa9053480ae43c1d20a31094b59855a46d6fcf9bc8b11b77855de32a9b32d9' 
  AND token = 'hlMmU+2WVny46YDAEDXYSQQS2C8bgiaqK5YOt99rYD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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