Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84fbcb0a4d4f2f4bd3723d1262ec5dae25e1d25a42942e9b271774190e8b8638' 
  AND token = 'aS80I8l+1mniVHSwU6dcvi5IeRSviHNXvtAsAJvWr/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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