Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '291bcaa6f69a5fd88ac3945255018815ba90e8994f8721636e8e323209699dc2' 
  AND token = 'ZyDNDrLu1B67EI49qoX4CUAcjfYl6lHZaL7m3v/ebMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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