Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1559986ad368c2d6102e0e431524a9f18f0d1611fbcd78e387af50d795bda52a' 
  AND token = 'ZoBCyC6FbqzdReUniJk6AXOYdyxd3mOxVoFGgMm5eR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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