Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '767f37aec53fb01c846906877cfb67194c7365f299479e7ee29ee9e587be8a1a' 
  AND token = 'P54Jf1JGrvruXJpK9vJleqKFO7PZ4wGPIcJfOCylJvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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